What is Casein Protein?

Casein protein makes up about 80% of the
protein found in milk. It is a complete protein that comes
in several forms that
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are usually derived from skim
milk. Due to the clotting nature of casein (it forms a gel
in your stomach), its digestion is slow and steady. Casein
can steadily deliver amino acids to muscles over a
seven-hour time period. “Having such a steady supply of
amino acids has been shown in scientific studies to prevent
muscle protein breakdown, which some scientists suggest is
just as important for muscle growth as enhancing muscle
protein synthesis,” says Tabatha Elliott, PhD, research
scientist and nutrition expert.
Just In Case Casein proteins are listed as one of the
following:
Caseinate (calcium caseinate,
sodium caseinate or potassium caseinate) is the
most soluble form of casein, which allows it to mix very
easily. If you happen to be limiting your sodium intake,
you may want to consider avoiding products with high
amounts of sodium caseinate.
Micellar casein (MC) is made by using
microfiltration to separate the casein portion of milk from
the lactose, fat and whey. MC digests much more slowly than
the other casein proteins, which is its greatest strength.
“The protein drink you take before bed should contain a
good deal of micellar casein to prevent muscle breakdown
while you sleep,” recommends Stoppani.
Hydrolyzed casein protein (HCP), similar
to whey-protein hydrolysate, is formed by the hydrolysis of
casein protein. Unlike the other caseins, particularly
micellar casein, HCP is rapidly digested at a similar rate
to whey.
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